13385871565785 has 32 divisors (see below), whose sum is σ = 24132275516160. Its totient is φ = 7038580348800.

The previous prime is 13385871565771. The next prime is 13385871565813. The reversal of 13385871565785 is 58756517858331.

It is a happy number.

13385871565785 is a `hidden beast` number, since 1 + 3 + 3 + 8 + 58 + 7 + 1 + 565 + 7 + 8 + 5 = 666.

It is not a de Polignac number, because 13385871565785 - 2⁵ = 13385871565753 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 698262276 + ... + 698281445.

It is an arithmetic number, because the mean of its divisors is an integer number (754133609880).

Almost surely, 2^{13385871565785} is an apocalyptic number.

13385871565785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13385871565785 is a deficient number, since it is larger than the sum of its proper divisors (10746403950375).

13385871565785 is a wasteful number, since it uses less digits than its factorization.

13385871565785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396543806 (or 1396543800 counting only the distinct ones).

The product of its digits is 846720000, while the sum is 72.

The spelling of 13385871565785 in words is "thirteen trillion, three hundred eighty-five billion, eight hundred seventy-one million, five hundred sixty-five thousand, seven hundred eighty-five".